Edward j



UNITED/STATES PATENT- OFFICE.

.EDWARD J, D QLAN, oF rHILADELriIiA, PENNSYLVANIA, AssIGNondfo aWILLIAMHACKER, TRUSTEE, on SAME rLAon.

. ennemieArron forming para ef'neaersnaem Nb. 376,817

, dated'Jax-iu'ary 24, 1858.

Applicativi: filed November ll, lSe'l.l Serial No, 25|,92'l (No model.)

To all' whom/ it may concerm- Be it known that'l, EDWARD J. DQLAN, acitizen of che United-states, residingat rimadelphia, in

Stateof Pennsylvania, have invented certain new andI useful Improvementsi ri Seamsfor Sheet Metal; and I do declarev the, following tobe a full,clear, and exactdescriptio'n of the iii-i' lvention, such` as willienable othersl skilled in the art to'which it appertains to make' andusel the same, reference being had to the accompanying drawings, and tothe'letters and figures 'of reference marked thereon, which form a partj of this specification. [5

My invention relates to the' construction of seams for connecting 'theedges of sheet metal, and hasfor its object to generally improvei n'theconstruction of this class ofseams and to provide afs'eani4 which may berendered both air and water tight by applying solder upon but one faceot'y theseam only, thus rendering its use particularly.valuable .in theconstruction of metallic cans which areintended for use'in.I packingfruit or vegetables and ih which the presence of solder. upon the insideofthe can is objectionable on account of its liability to poison orotherwise injure the contents of the can.:

' To these ends, and to. such others as the in`- 'ention may relate, thesame consists in the 'peculiar construction of the seam, hereinafter 'idescribed, shown in't-he drawings, and afterv j ward de'fnedlintheclaim. i .l 'Inth'e accompanying drawings,

an endview of two-sections of sheet metal atl tached by my improvedseam, which is shown the county of Philadelphia and' `ters Patent, is-

folds B B, interlock'ed, as

Figure 1 is which the seam is shown as it appears after having been compressed. showing the'seani after'the solder has-been applied." Fig.elisa similar view in which the opl posite or unsoldered face of theseam-issho'wn. `Referring, now,'to'thedetailsof thedrawings, A1A metal..The adjacent edges of each are bent so as to form a (loable curve orS,.as shown at l B.' These edges are hooked or connected together, asshown in Fig. the seam thus formed is afterward flattened by passingbetween suitable rollers or dies,A It

will be observed ,that a seam constructed in this' mannerwill be jmuchmore strong and in cross-section. vFig. 2 is a similar v iewin Fig. aisepian 'Viewv A40 represent.v two separate ypieces of sheet l of' thedrawings, and vdurable than theordinary loek-seain,the same beingdoubled andthe edges of the tin fully protected.

of its faces only. Having thus d claim t0 be new,

yA seam lof this kind may be ren-i .dered perfectly' tight by applyingsolder to one of the seam, substantially as escribed'myinvention,w11at If and desire to secure by Lct'-

